who better to astabout inefficiencies in the u.s. health care system than the patients it serves, you? ha sreenivasan explains. >> sreenivasan: we asked for your first-hand accounts of the ways you've experienced wasteful practices in dical care. find those stories, plus all oui healthcare reporting this week on our health page. gwen ifill counts down to election day with some interesting campaign numbers, like how many people have already voted. that's gwen's take.nt find e latest satelinte imagege of hurricane sandy as it whirls up the east coast, plus a slide show of images from e storm so far. on tonight's "need to know", rick karr examines the controversy over new voting rules in the battleground state of florida. >> reporter: that's interstate four down there. the highway cuts the state of florida in half. to the north of it, a majority floridians vote republican. on the other side, tthe south of it, a majority vote democratic. so the balance of political power in florida is here in orlando and in the counties along i-4.e, you